﻿#region Copyright
// Copyright (c) 2011-2012 RaisingForce Team (Alikin Sergey)
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Diagnostics.Contracts;
using RaisingForce.Raise.Language.Rules;

namespace RaisingForce.Raise.Language.Model
{
    public abstract class Glyph
    {
        #region Constructors

        protected Glyph(string typeName, string value)
        {
            if (!GlyphRules.TypeNameIsValid(typeName))
            {
                throw new ArgumentException("typeName");
            }
            if (!GlyphRules.ValueIsValid(value))
            {
                throw new ArgumentException("value");
            }
            Contract.EndContractBlock();
            this.typeName = typeName;
            this.value = value;
        }

        #endregion

        #region Private Declarations

        private readonly string typeName;

        private readonly string value;

        [ContractInvariantMethod]
        private void ObjectInvariant()
        {
            Contract.Invariant(GlyphRules.TypeNameIsValid(this.typeName));
            Contract.Invariant(GlyphRules.ValueIsValid(this.value));
        }

        #endregion

        #region Properties

        public string TypeName
        {
            get
            {
                Contract.Ensures(GlyphRules.TypeNameIsValid(Contract.Result<string>()));
                return this.typeName;
            }
        }

        public string Value
        {
            get
            {
                Contract.Ensures(GlyphRules.ValueIsValid(Contract.Result<string>()));
                return this.value;
            }
        }

        #endregion
    }
}
